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This study evaluates the performance of an IEEE 802.15.4/4g low-rate wireless personal area network (LR-WPAN) physical layers to support Wireless Sensor Networks (WSN) applications deployed in underground mines. Two physical layer models were constructed based on the IEEE 802.15.4 and IEEE 802.15.4g specifications. An appropriate channel model for the underground mine environment was selected and...
This paper deals with a method for QoE evaluationfor the services transmitting large amount of data perceived by the end user in relatively short time periods, e.g. streaming video in mobile operator network. Surprising factor of the new method relies on QoE/MOS evaluation, which is based on the smallest building unit which is a frame for a video session and evaluating throughput, packet delay and...
In recent years, convolutional neural networks (CNNs) based machine learning algorithms have been widely applied in computer vision applications. However, for large-scale CNNs, the computation-intensive, memory-intensive and resource-consuming features have brought many challenges to CNN implementations. This work proposes an end-to-end FPGA-based CNN accelerator with all the layers mapped on one...
Heterogeneous network systems were proposed to cope with explosively increased data traffic in wireless communications networks. In heterogeneous networks, small cells are additionally deployed to offload the data traffic of a macrocell, which results in highly improved data traffic capacity. Locational property of small cells affects the capacity of small cell networks significantly. In this paper,...
Heterogeneous networks (HetNets) and multicell cooperation are two key technologies in cellular networks that can improve network performance. The channel information of all the collaborating Base Stations (BSs) is one of the core factors to achieve better throughput performance gain in the coordinated multipoint (CoMP) communication. Here, we propose a novel method for handling Channel State Information...
Traditional routing mode is just responsible for receiving and forwarding data packets. The proposing of network coding offers a new research direction for the development of wireless sensor networks(WSN) [1]. Preliminary theoretical studies and experiments have shown the advantages of network coding which can improve throughput and reduce energy consumption in WSN [2,3]. By linear coding operation,...
This paper presents XL-STaGe, a cross-layer tool for traffic-inclusive directed acyclic graph generation and implementation. In contrast to other graph-generation tools which focus on high-level DAG models, XL-STaGe consists of a set of processes that generate the task-graphs as well as a detailed process model for each node in each graph. The tool is highly customizable, with many parameters that...
Downlink throughput performance in Long Term Evolution - Advanced (LTE-A) networks has been widely investigated by many simulation studies. However, these studies generally assume that users are uniformly distributed in regularly arranged hexagonal cells. Analytical models and methods of stochastic geometry have been applied to wireless networks to consider the effects of spatial configuration of...
Cloud computing platforms such as Amazon EC2, Google Computing Engine, and Microsoft Azure offer dozens of virtual machine (VM) types with a wide range of resource capacity vs. price trade-offs, requiring a customer to consider numerous resource configurations when evaluating service needs. This report investigates the possibility of using the diversity of VM types to predict the performance of new...
Non-lossy compression can save time and energy during communication if the cost to compress and send input is less than the cost of sending it uncompressed. Unfortunately, compression can also degrade performance, no single method is always beneficial, and outcomes depend on many factors. As a result, compression choices in real systems are coarsely grained and manually controlled, resulting in suboptimal...
This paper investigates the performance of a Cognitive Radio Network, emphasizing the secondary users performance. Users are modeled by a priority M/G/1 queue, in which primary users have a higher priority than secondary users. The performance of the system is evaluated by a performance metric called Power Metric. We considered that transmissions occur over a Nakagami-m channel model. Different modulation...
The Wireless sensor network (WSN) deployment areas in real time environment are often inaccessible and unreliable communication resulting in degradation of network performance. The critical issues in any WSN are QoS and energy. Post deployment, it may not always be feasible to replace the batteries in a WSN. Long hops of transmission maintaining the QoS with more energy consumption results in reduction...
The Argo project is a DOE initiative for designing a modular operating system/runtime for the next generation of supercomputers. A key focus area in this project is power management, which is one of the main challenges on the path to exascale. In this paper, we discuss ideas for systemwide power management in the Argo project. We present a hierarchical and scalable approach to maintain a power bound...
This paper describes a joint radar-communications resource management framework and modeling approach for a synergistic concept that integrates the radar and communications functionality into a single shared-spectrum system. Such systems share a single transmission — communicating with mobile radios and illuminating the target simultaneously. The results are presented as a function of system exclusivity,...
Spatial throughput (i.e. throughput with spatial reuse) is important with new types of networks such as vehicular, sensor and military networks. The aim of this study is to compute the spatial throughput of Aloha and CSMA using tools for stochastic geometry. Our network nodes will be modeled as elements of a Poisson Point Process (PPP) of a one- or two-dimensional space. Spatial Aloha can be modeled...
Résumé — Inter-cell interference is a major issue in OFDMA networks, due to the increasing density of Low Power Nodes (LPN) used to offload the macro base stations. Coordination between these nodes also called Coordination MultiPoint (CoMP), is identified as a promising solution to improve the signal quality and the achievable throughput while ensuring spectral efficiency over the network. Joint Transmission...
The increasing programmability, performance, and cost/effectiveness of GPUs have led to a widespread use of such many-core architectures to accelerate general purpose applications. Nevertheless, tuning applications to efficiently exploit the GPU potentiality is a very challenging task, especially for inexperienced programmers. This is due to the difficulty of developing a SW application for the specific...
This paper is a broad introduction to the resource allocation problems in cloud systems including Inter-Clouds and Mobile Clouds as well as proposed solutions to these problems. Allocation of computing and network resources to cloud tasks requires innovative approaches in each case of cloud data centers, Inter-Clouds and geographically distributed clouds in order to optimize various performance criteria,...
Cloud computing is gaining acceptance in many IT organizations, as an elastic, flexible, and variable-cost way to deploy their service platforms using outsourced resources. Unlike traditional utilities where a single provider scheme is a common practice, the ubiquitous access to cloud resources easily enables the simultaneous use of different clouds. In this paper, we explore this scenario to deploy...
The sensor node reporting plays a important role in the propose of wireless sensor networks. In addition to coverage, shape and region is also important in WSN to limit the power utilization which is taken as the current research work for successful sensor network structure. Neighbor Position Verification strategy with the help of fully distributed cooperative scheme enabled each node to acquire the...
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